EWG Level: 3
t-Butyl Hydroquinone, also called TBHQ, is a white to light tan crystalline solid. In cosmetics and personal care products, TBHQ is used in the formulation of lipsticks, colognes, moisturizers and other makeup products. In addition to its use in cosmetics and personal care products, TBHQ is used in fats, oils, and meat products to prevent oxidative rancidity.
Funtions: Antioxidant, Fragrance Ingredient: Masking: Perfuming
“Determined safe for use in cosmetics, subject to concentration or use limitations – Safe for use in cosmetics with some qualifications” (Cosmetic Ingredient Review Assessments)
Cancer Concern, “Not likely to be carcinogenic in humans” (National Toxicology Program(NTP))
“Designated as safe for general or specific, limited use in food” (FDA Everything Added to Food)
Concern, “Not suspected to be persistent, Not suspected to be bioaccumulative” (Environment Canada Domestic Substance List)